The resulting waste from a thorium reactor is radioactive for dozens or hundreds of years not tens of thousands of years so you don’t need a giant Yucca Mountain style disposal site

That is assuming they don’t make significant amounts of Fe-60 (2.6 My half-life) by exposing steel pipes to neutron flux. While the fuel itself might have a shorter half-life, other waste still needs to be dealt with.

• Measles estimated case-fatality rate: 1.3%
• Estimated US population: 346,715,067
• Measles deaths if everyone in the US got measles: 4,507,295
• Upper limit on estimated MMR vaccine caused anaphylaxis: 0.000066%
• Anaphylaxis case-fatality rate: 0.3%
• Estimated vaccine-caused fatality rate: 1.98 * 10^-7 %
• Estimate vaccine-caused fatalities avoided by not vaccinating US population: 0.69
• Net increase in fatalities from switching to measles natural immunity for everyone in the US: 4,507,294

So it would only be better if he wants an extra 4.5 million Americans to die.